Re: preg error in 1.4.20-RC2

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On, Sept 10th, at 16:56, Helmut Hullen wrote:
> Hallo,
> 
> 
> when I call "Ordner" (folders) all folders are shown, but under \
> "export/ import" there are many lines with
> 
> 
> Warning: preg_match() [function.preg-match]: Unknown modifier '/' in  
> /home/www/squirrelmail-1.4.20-RC2/functions/imap_mailbox.php on line 758
> 
> Warning: preg_match() [function.preg-match]: Unknown modifier '/' in \ 
> /home/www/squirrelmail-1.4.20-RC2/functions/imap_mailbox.php on line 759
> 
> 
> -------------------
> 
> Then follows the window with the available folders.
> 
> All other functions seem to work well.

I have just run into this myself.  I believe Helmut was referring to
"UnSubscribe / Subscribe" when he mentions "export / import".  Perhaps
that minor translation issue is part of the cause of lack of responses.

The error messages show in the Subscribe column, and I believe there is
one entry for each folder I have on the server. (lots)

I am running Cyrus IMAPd with the unixhierseperator.  The folder
delimiter is "/".  I am already subscribed to all of the folders.

--------
Warning: preg_match() [function.preg-match]: Unknown modifier '/' in
/usr/local/www/squirrelmail/functions/imap_mailbox.php on line 758
... (repeats hundreds of time) ...
No folders were found to subscribe to!
--------

/usr/local/www/squirrelmail/functions/imap_mailbox.php:
-------
758:            if((preg_match('/^inbox'.quotemeta($delimiter).'/i', $mailbox)) ||
759:               (preg_match('/^'.$folder_prefix.'/', $mailbox)) ||
760:               ( isset($boxesallbyname[$parentfolder]) && (strlen($parentfolder) > 0) ) ) {
-------

I suspect Helmut may have $folder_prefix specified as something like
"INBOX/" to get the error on line 759 as well as 758.

http://php.net/manual/en/function.quotemeta.php:
-------
string quotemeta  ( string $str  )

Returns a version of str with a backslash character (\) before every character that is among these:
. \ + * ? [ ^ ] ( $ )
-------

That doesn't list "/" so I am wondering if that is the problem.

I wonder if it would be possible to choose a different regex
delimiter(?) rather than "/". Something like "#", or something else
which is not allowed as part of an IMAP mailbox name per the specs and
reality.  

I haven't checked to see what characters that would leave available.  I
also don't have an install of squirrel mail which is not in production
so I am afraid to test this suggestion without input from those who know
more about the topic than I.

In other words:
758:            if((preg_match('#^inbox'.quotemeta($delimiter).'#i', $mailbox)) ||
759:               (preg_match('#^'.$folder_prefix.'#', $mailbox)) ||
760:               ( isset($boxesallbyname[$parentfolder]) && (strlen($parentfolder) > 0) ) ) {

Thank you for your assistance.

FreeBSD 8.0-RC1 FreeBSD 8.0-RC1 #2: Fri Sep 18 20:12:14 CDT 2009     
root@localhost:/usr/obj/usr/src/sys/GENERIC  i386

apache-2.2.13       Version 2.2.x of Apache web server with prefork MPM.
cyrus-imapd-2.3.15  The cyrus mail server, supporting POP3 and IMAP4 protocols
cyrus-sasl-2.1.23   RFC 2222 SASL (Simple Authentication and Security Layer)
mysql-client-5.1.39 Multithreaded SQL database (client)
pcre-7.9            Perl Compatible Regular Expressions library
pear-1.9.0          PEAR framework for PHP
pear-DB-1.7.13,1    PEAR Database Abstraction Layer
php5-5.2.11         PHP Scripting Language
php5-ctype-5.2.11   The ctype shared extension for php
php5-dom-5.2.11     The dom shared extension for php
php5-filter-5.2.11  The filter shared extension for php
php5-gettext-5.2.11 The gettext shared extension for php
php5-hash-5.2.11    The hash shared extension for php
php5-iconv-5.2.11   The iconv shared extension for php
php5-imap-5.2.11    The imap shared extension for php
php5-json-5.2.11    The json shared extension for php
php5-mbstring-5.2.11 The mbstring shared extension for php
php5-mcrypt-5.2.11  The mcrypt shared extension for php
php5-mhash-5.2.11   The mhash shared extension for php
php5-mysql-5.2.11   The mysql shared extension for php
php5-openssl-5.2.11 The openssl shared extension for php
php5-pcre-5.2.11    The pcre shared extension for php
php5-pdo-5.2.11     The pdo shared extension for php
php5-pdo_sqlite-5.2.11 The pdo_sqlite shared extension for php
php5-posix-5.2.11   The posix shared extension for php
php5-pspell-5.2.11  The pspell shared extension for php
php5-session-5.2.11 The session shared extension for php
php5-simplexml-5.2.11 The simplexml shared extension for php
php5-spl-5.2.11     The spl shared extension for php
php5-tokenizer-5.2.11 The tokenizer shared extension for php
php5-xml-5.2.11     The xml shared extension for php
php5-xmlreader-5.2.11 The xmlreader shared extension for php
php5-xmlwriter-5.2.11 The xmlwriter shared extension for php
squirrelmail-1.4.20.r2_1 A webmail system which accesses mail over IMAP
squirrelmail-avelsieve-plugin-1.9.7_2 SquirrelMail plugin for Server-Side Mail Filtering manageme
squirrelmail-compatibility-plugin-2.0.14 Required by many plugins for compatibility with SquirrelMai
squirrelmail-email_footer-plugin-0.5_1 Automatically appends footer to SquirrelMail-generated emai
squirrelmail-login_notes-plugin-1.2 Place notes on the login screen
squirrelmail-notes-plugin-1.2_1 Allows you to create notes
squirrelmail-notify-plugin-1.3_1 Notify when new mail arrives
squirrelmail-plugins-1.0_1 A "meta-port" to install SquirrelMail plugins
squirrelmail-pupdate-plugin-0.7_2 Checks for plugin updates by parsing the SM site
squirrelmail-quota_usage-plugin-1.3.1_1 View quota and current usage
squirrelmail-secure_login-plugin-1.4_1 This plugin will automatically turn on SSL security during 
squirrelmail-timeout_user-plugin-1.1.1_2 Automatically logs a user out if they're idle for a set amo
squirrelmail-vlogin-plugin-3.10.1 Adds multi-site-hosting capabilities to SquirrelMail
squirrelmail-web_search-plugin-0.1.6_1 Plugin for Websearch

-- 
Scott Lambert                    KC5MLE                       Unix SysAdmin
lambert@xxxxxxxxxxxxxx


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